为什么是I often play football.而不是I often plays football.

为什么是I often play football.而不是I often plays football. I often play football after school.(play football 划线提问) I often （ ）【play】 football last afternoon often play i football sunday on I often play football and s_______. I often play football.的问句 I often see some boys______(play)football I often play football.划线部分提问 I often piay football.为什么often可以改成usually I often play football after school.改为一般疑问句 i often play football on sunday.[改为一般疑问句】 将often play i football sunday on连词成句